KR100755010B1 - Lighting device - Google Patents

Lighting device Download PDF

Info

Publication number
KR100755010B1
KR100755010B1 KR1020070017218A KR20070017218A KR100755010B1 KR 100755010 B1 KR100755010 B1 KR 100755010B1 KR 1020070017218 A KR1020070017218 A KR 1020070017218A KR 20070017218 A KR20070017218 A KR 20070017218A KR 100755010 B1 KR100755010 B1 KR 100755010B1
Authority
KR
South Korea
Prior art keywords
light
light source
diffusion plate
plate
diffusion
Prior art date
Application number
KR1020070017218A
Other languages
Korean (ko)
Inventor
황천남
Original Assignee
황천남
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to KR20060105388 priority Critical
Priority to KR1020060105388 priority
Application filed by 황천남 filed Critical 황천남
Application granted granted Critical
Publication of KR100755010B1 publication Critical patent/KR100755010B1/en

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/04Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0205Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0231Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0205Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0273Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278Diffusing elements; Afocal elements characterized by the use used in transmission
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133606Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/04Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0409Arrangements for homogeneous illumination of the display surface, e.g. using a layer having a non-uniform transparency
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/04Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0413Frames or casing structures therefor
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/24Illuminated signs; Luminous advertising using tubes or the like filled with liquid, e.g. bubbling liquid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/04Signs, boards or panels, illuminated from behind the insignia
    • G09F2013/0418Constructional details
    • G09F2013/0422Constructional details characterised by the presence of reflectors
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/04Signs, boards or panels, illuminated from behind the insignia
    • G09F2013/0418Constructional details
    • G09F2013/0445Frame details

Abstract

A lighting device is provided to uniformly diffuse the light over the whole surface of a diffusion plate by scattering the light emitted from a light source through bubbles of the diffusion plate and to transmit the light of the light source at high light transmissivity, thereby improving the visibility of the lighting device. A lighting device(50) is composed of a light source for emitting the light and a diffusion plate(53) disposed at the front side of the light source and made of transparent or semi-transparent resin material having bubbles for scattering the light, to diffuse the light emitted from the light source over the whole surface, wherein the diameter of the bubble is within a range of 60~700 micrometers. The content rate of the bubbles included in the diffusion plate is 5~35%.

Description

Lighting Device

1 is an exploded perspective view showing an example of the configuration of a conventional advertising device is applied lighting device

Figure 2 is an exploded perspective view of the advertising device is applied lighting device according to an embodiment of the present invention

3 is a cross-sectional view of main parts of the lighting apparatus of FIG.

4A to 4C are views showing modifications of the supporting member of the lighting apparatus shown in FIG.

5 is a sectional view showing the principal parts of another embodiment of a lighting apparatus according to the present invention;

Explanation of symbols on the main parts of the drawings

10: frame 20: window panel

40: advertising sheet 50: lighting device

51: circuit board 52: light emitting diode

53 diffuser plate 54 bubble

55: resin plate for auxiliary diffusion 56: support member

The present invention relates to a lighting device, and more particularly, used as an advertising device such as a billboard, or a lighting device for illuminating an interior, or an lighting device for an interior, and provides a uniform amount of light throughout the entire area. It relates to a lighting device having a transmittance.

Recently, various advertisement devices such as advertisements, billboards, self-emitting advertisement devices, etc., are used for product advertisements or business advertisements of various companies. These advertising devices use a variety of pictures, phrases, photographs, drawings, etc. to increase the visibility of information to buyers, especially those that use lighting devices to properly deliver the desired information at night or low light. It is developed a lot.

1 of the accompanying drawings shows a configuration of a conventional advertising device is applied, the conventional advertising device is a window panel 2 in the form of a transparent panel in front of the frame 1 having a predetermined shape, such as a rectangular It is installed, the advertising sheet (4) is installed on the back of the window panel (2), the lighting device (5) for providing the light toward the front advertising sheet (4) in the rear of the advertising sheet (4) ) Consists of an installed configuration.

The lighting device 5 includes a plurality of light emitting diodes 5a (light emitting diodes) (LEDs) spaced at regular intervals as light sources, and a diffusion plate for diffusing light emitted from the light emitting diodes 5a. 5c). The light emitting diodes 5a are installed on a circuit board 5b such as a PCB.

Therefore, when power is applied to the light emitting diodes 5a through the circuit board 5c, light is emitted through the light emitting diodes 5a, and the emitted light is spread through the diffuser plate 5c so that the front advertising sheet ( 4) is provided.

However, the lighting apparatus used in the conventional advertising apparatus is installed so that the light emitting diodes 5a serving as light sources have a predetermined interval, and the diffusion plate 5c has a simple plate structure, and thus the diffusion degree is low. The portion where 5a) is installed is relatively bright and the portion away from the light emitting diode 5a is relatively dark, so that the entire advertising device cannot provide light of uniform brightness.

If the brightness difference is more than a certain degree, the visibility of the advertisement designed in the advertisement sheet 4 is remarkably degraded, and a problem may occur in that the contents of the advertisement may not be properly delivered.

Therefore, conventionally, in order to solve such a problem of light uniformity reduction, measures such as reducing the number and interval of light emitting diodes and employing light emitting diodes having a wide radiation angle have been devised. In this case, not only the manufacturing cost increases but also the power consumption. Increasingly, structural complexity also increases.

In addition, the diffusion plate used in the conventional lighting device is mostly manufactured by adding polymer particles, such as partially crosslinked inorganic particles, styrene-based or acrylic polymer particles. There is a costly problem. In addition, such a diffuser plate is excellent in light diffusion, but the light transmittance is low, there is a problem that the overall luminance characteristics are low.

In addition, a conventional fluorescent lamp or other lighting device is provided with a light transmissive cover to provide a soft light as the light emitted from the light source is diffused throughout the room, the light transmissive cover is made of simple resin or glass, so the light transmittance is low There is a problem in that it cannot provide light with a uniform amount of light as a whole.

The present invention is to solve the above-mentioned problems, the object of the present invention is to provide a high brightness characteristics with excellent light transmittance, while providing light of uniform brightness over the entire portion of the lighting device at a low cost. To provide a lighting device that can be.

The present invention for achieving the above object, and a light source for emitting light; It is disposed in front of the light source, and made of a transparent or semi-transparent resin material having a bubble having a diameter within the range of 60㎛ ~ 700㎛ for scattering light therein, diffuse the light emitted from the light source to the entire surface It provides a lighting device configured to include a diffuser.

According to the present invention, since the light emitted from the light source of the illumination device is scattered by the bubble having a predetermined size of the diffuser plate, the light is uniformly spread over the entire surface of the diffuser plate, and excellent light transmittance Can be provided. Therefore, by applying such a lighting device, while providing a uniform amount of light over the entire surface of the advertising sheet of the advertising device to provide a high light transmittance, there is an advantage that can improve the brightness characteristics, and thus the visibility.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the lighting apparatus according to the present invention.

Although the lighting apparatus of the present invention described below is applied to an advertising apparatus, the present invention may be applied to various lighting apparatuses, such as a lighting apparatus for illuminating an interior, such as a fluorescent lamp, or an interior lighting apparatus having a specific form.

As shown in Figures 2 and 3, the advertising device to which the illumination device of the present invention is applied is provided with a window panel 20 in the form of a transparent panel in front of the frame 10 having a predetermined shape, such as a rectangle, Advertisement sheet 40 is installed on the back of the window panel 20, the lighting device 50 for providing light toward the front advertising sheet 40 in the rear of the advertising sheet 40 is installed Is done.

The advertisement sheet 40 and the window panel 20 may be formed individually, but may be integrally formed with each other, and the advertisement sheet 40 is directly fixed to the frame 10 without the window panel 20 to the outside. It may also be configured to be exposed.

In addition, the advertising sheet 40 is in the form of a thin film differently coated on the front surface of the secondary diffusion resin plate 55 or diffuser plate 53 constituting the lighting device 50, or a thin cloth or screen However, it may be formed in the form of a rigid plate closely attached to the front surface of the lighting device 50, or may be arranged to be spaced a predetermined distance apart. In addition, the advertisement device may be configured by directly printing the letters or drawings for the advertisement on the resin plate 55 or the diffusion plate 53 of the lighting device 50 without using the advertisement sheet.

The lighting device 50 includes at least one circuit board 51 installed on the frame 10 at regular intervals and a plurality of light emitting diodes 52 disposed on the circuit board 51 at regular intervals to emit light. It consists of a light source consisting of, a rectangular plate-shaped diffuser plate 53 disposed between the light source and the advertisement sheet 40, and a secondary diffusion resin plate 55 disposed on the front surface of the diffuser plate 53. .

The circuit board 51 of the light source may be made of a single body, but may be configured using a plurality of circuit boards having an elongated strip shape as shown in FIG. 1.

The diffusion plate 53 is made of a transparent or translucent light transmissive material, such as polycarbonate (PC), polymethylmethacrylate (PMMA), acrylic, epoxy, polyethylene terephthalate (PET), or melamine resin, and internally for scattering light Bubbles 54 of a predetermined size are formed.

The bubble 54 may be formed by extrusion or injection when the diffusion plate 53 is manufactured, or may be formed by foam molding such as foam extrusion or foam injection.

The number and size (diameter) of bubbles 54 per unit volume formed in the diffusion plate 53 should be formed in an appropriate number and size in consideration of diffusibility and permeability. That is, when the number of bubbles 54 per unit volume of the diffusion plate 53 is too large, light may not be transmitted well and light transmittance may be lowered. On the contrary, when the number of bubbles 54 per unit volume of the diffusion plate 53 is too small, light scattering may be low and diffusion may not be performed properly.

In addition, when the size of the bubble 54 is too small, the light diffusivity may be good, but the light transmittance is significantly lowered, resulting in a lowering of the overall luminance characteristics.

Accordingly, the present invention is limited to the size of the bubble 54 in the range of 60㎛ ~ 700㎛ to satisfy both the light transmittance and the light diffusion. When the size of the bubble 54 is 700 µm or more, the light transmittance is improved, but the light diffusivity is lowered. When the size of the bubble 54 is smaller than 60 µm, the light diffusivity is good but the transmittance of the light is lowered and the luminance is lowered. Thus, when the size of the bubble 54 is small and the transmittance is lowered, the luminance is lowered. Therefore, there is a problem that the diffusion plate 54 cannot be applied to an illumination device such as an advertisement board or a lamp cover. In general, in the advertising industry, outdoor billboards are known to be suitable when the illuminance is at least 1500 lux.

In addition, when the size of the bubble 54 is 60 μm or more, the general person can visually observe the bubble 54 without the help of a device such as a microscope. When the bubble 54 is smaller than this, the bubble 54 ), It is difficult to check with the naked eye, and when the size of the bubble 54 is 60 µm or less and the bubble content is 5% or more, the entire diffuser plate 53 has a color close to gray instead of white. ) Can be used for high-precision diffusion, such as a light guide plate, but is not suitable for use in advertising billboards, lamp covers, interior devices, and the like. That is, when the diffusion plate 53 is gray, it affects the intrinsic color of the advertisement sheet of the advertisement apparatus, and the color reproduction rate is lowered, which is not suitable for applying to the advertisement apparatus, the lamp cover, or the interior apparatus. .

Table 1 below is an experiment of the methyl methacrylate (PMMA) resin by impregnating carbon dioxide gas at supercritical pressure and then reducing the pressure to foam the nuclei of bubbles generated at high temperature (100 ° C.) and cooling them with diffusion plates. One result is shown. The light source used in the experiment was configured by arranging the light emitting diodes (LED) having a radiation angle of 120 degrees and 3000 mcd (millicella) of SMD 2CHIP in three horizontally x three vertically at 50 mm intervals. Then, a light panel having a height of 50 mm is manufactured, and a PCB in which the light emitting diodes are installed is installed therein, the illuminance of the upper end of the light panel is adjusted to 3600 lux, and then a diffuser plate is placed at this point. Etc. were measured.

Particle Size (Micro) 60 ~ 700 (㎛) 1 to 50 (㎛) Included flow rate (%) 4 20 46 18 Illuminance value (lux) 3492 3312 2268 2160 Total light transmittance (%) 97 92 63 60 Light diffusion lowness good Very good Very good Light rug Translucent White White Light gray Ad image installation Illuminance value (lux) 2270 2152 1474 1404 Check light source Confirm Not OK Not OK Not OK Availability for advertising can not be used Available can not be used can not be used

As can be seen in Table 1, when the size of the bubbles contained in the diffusion plate 53 is 60 ~ 700㎛ has a good roughness of more than 3300 lux (bubble) at 4% and 20% of the bubble content, respectively, bubbles When the size was 1 to 50 µm (bubble content 18%), the roughness was significantly reduced to 2160.

And when the bubble size is 60 ~ 700㎛, the total light transmittance was 97% and 92% at 4% and 20% of the bubble content, respectively. It can be seen that the transmittance is significantly reduced to 60%.

In addition, when experimenting with the advertising image on the diffuser plate, if the bubble size is 60 ~ 700㎛ both in the advertising industry of 2270 lux and 2152 lux in the bubble content of 4% and 20% respectively Although the illuminance value was well above the required 1500 lux standard for outdoor advertisements, the bubble size was 1400 lux lower than the 1500 lux standard for outdoor advertisements. .

As can be seen from these experimental results, the diffusion plate 53 of the present invention has excellent luminance characteristics and light transmittance at a bubble content of approximately 4-20% when the bubble size is 60 ~ 700㎛.

However, if the bubble size of the diffusion plate is in the range of 60 ~ 700㎛ but the bubble content is less than 4%, light diffusion is low, and the color is also close to translucent, so when the advertisement image is installed, the light source is visible to the outside and the light source can be checked. Therefore, it becomes unsuitable as a billboard. Therefore, in order to apply the diffusion plate to an advertisement device such as an advertisement board, the size of the bubble is preferably 5% or more in the range of 60 to 700 μm.

More preferably, when the diffuser plate is applied to an advertisement device such as an advertisement plate, the bubble of the diffuser plate has a size of 60 to 700 µm, and the bubble content rate is most preferably in the range of about 10% to 20% in this size range. .

On the other hand, since the diffuser plate having a bubble size of 1 to 50 μm has a very good light diffusivity, it is advantageous when applied to a light guide plate of a liquid crystal display device, but is not suitable as an advertisement device, a lighting lamp, or an interior device.

As described above, the diffusion plate 53 according to the present invention showed light transmittance of about 90% or more and excellent roughness value, but the diffusion plate with too small bubble particles or too large bubble content has low light transmittance and low illuminance. It can be seen that it is not suitable for the back.

In addition, light guide plates for general liquid crystal display devices without bubbles have a light transmittance of about 70 to 75%, and because inorganic particles such as titanium oxide are used, they are heavy and expensive, and thus they are difficult to be applied to large billboards or lamps. .

However, the diffuser plate of the present invention is reduced in weight due to the bubble 54, the production cost is also low and easy to manufacture large, can satisfy both the light diffusion and light transmittance.

In addition, it is preferable that the bubbles 54 formed in the diffusion plate 53 have different sizes from those arranged in the front and those arranged in the rear. For example, it is preferable that the bubbles 54 arranged behind the diffuser plate 53 have a smaller size than the bubbles 54 arranged in front of the diffuser plate 53. In this case, the bubble 54 of the diffuser plate 53 can be visually checked from the outside, and when light is provided from the light source, the light traveling toward the diffuser plate 53 easily passes while meeting the large bubble 54. Therefore, it is possible to provide excellent luminance characteristics.

In the case where the average size of the bubbles 54 arranged in front of the diffuser plate 53 and the bubbles 54 arranged in the rear is different, it has been confirmed that the permeability is further improved without decreasing the diffusivity.

On the other hand, the auxiliary diffusion resin plate 55 is preferably made of white, in addition to other colors such as yellow or yellow, it may be made of a light-transmissive resin material such as acrylic.

The auxiliary diffusion resin plate 55 may be formed separately from the diffusion plate 53, but alternatively, the auxiliary diffusion resin plate 55 may be integrally formed with the diffusion plate 53 by a double injection molding method.

In addition, when the advertising apparatus is enlarged and the diffusion plate 53 is made large, the deformation degree of the diffusion plate 53 is increased accordingly. Therefore, the diffusion plate 53 supports the diffusion plate 53 at the rear surface of the diffusion plate 53. It is preferable to prevent the plate 53 from being deformed. In the present invention, by forming a support member 56 for supporting the diffuser plate 53 with respect to the circuit board 51 between the diffuser plate 53 and the circuit board 51, the diffuser plate 53 is a light source of the rear Suggest ways to avoid bending

When the end of the support member 56 is in full contact with the diffuser plate 53, the light is not diffused completely in the area in which the support member 56 is in contact, so that this part is shaded when viewed from the outside. This can happen.

Accordingly, as shown in FIG. 4A, the support member 56 may be formed so that the tip portion of the support member 56 is slightly separated by the diffusion plate 53. Alternatively, as shown in FIGS. 4B and 4C, the support member 56 may be formed. It is preferable to minimize the contact area between the support member 56 and the diffusion plate 53 by forming the tip portion of the 56 in a curved shape or the tip portion in the form of a small pin or protrusion.

In addition, the support member 56 is preferably located at regular intervals between the light emitting diodes 52.

Meanwhile, the distance between the diffusion plate 53 and the circuit board 51 may be determined by the radiation angle of the light emitting diode 52 as a light source.

Specifically, the radiation angle of a typical light emitting diode 52 is about 70 degrees, and when the light emitting diode having such a radiation angle is used, the distance between the diffusion plate 53 and the circuit board 51 is preferably about 70 mm. Do.

However, when the emission angle of the light emitting diode 52 is larger than that, since the light diffusing degree of the light emitting diode 52 is good, the distance between the diffusion plate 53 and the circuit board 51 is smaller than 70 mm, or as shown in FIG. 5. It could be configured to be nearly concatenated as it was.

As illustrated in FIG. 5, when the circuit board 51 and the diffuser plate 53 are connected to each other, a plurality of grooves 53a in which the light emitting diodes 52 are accommodated are provided on the rear surface of the diffuser plate 53. It is preferably formed in the form of a channel.

The lighting apparatus according to the present invention configured as described above operates as follows.

When power is applied to each of the light emitting diodes 52 through the circuit board 51, light is emitted through the light emitting diodes 52. The light emitted from the light emitting diodes 52 enters into the diffuser plate 53, is scattered by bubbles 54 of the diffuser plate 53, and spreads to the entire surface of the diffuser plate 53. Done.

The light spread to the front by the diffusion plate 53 passes through the secondary diffusion resin plate 55 to be secondarily diffused to achieve a more uniform light uniformity, and then is emitted to the outside through the advertisement sheet 40 so as to The user can view the advertisement design of the advertisement sheet 40.

On the other hand, although the light emitting diode 52 (LED) is used as the light source in the above-described embodiment of the lighting device, a fluorescent lamp or a neon lamp may be used.

In addition, although the above-described lighting apparatus is applied to an advertising apparatus such as an advertisement board, the lighting plate according to the present invention is different from that of a lamp cover such as a fluorescent lamp cover or a stand cover, or a specific light source present therein. The case may be applied to a case of an interior device having an artistic shape such as a person or an animal.

The lighting apparatus for the advertising apparatus of the present invention may be variously implemented and modified within the spirit and scope of the invention defined by the claims of the present invention in addition to the above-described embodiments.

As described above, according to the present invention, since the light emitted from the light source of the lighting device is scattered by the bubbles of the diffuser plate, the light is uniformly spread over the entire surface of the diffuser plate, and the light source has a high light transmittance. It transmits the light emitted from it. Therefore, the uniform amount of light is provided over the entire surface of the advertisement sheet of the advertisement device, and the excellent brightness characteristics are provided to improve the visibility of the advertisement.

Claims (8)

  1. A light source for emitting light;
    It is disposed in front of the light source, and made of a transparent or semi-transparent resin material having a bubble having a diameter within the range of 60㎛ ~ 700㎛ for scattering light therein, diffuse the light emitted from the light source to the entire surface Lighting device comprising a diffuser to make.
  2. The illuminating device according to claim 1, wherein the content of bubbles contained in the diffusion plate is 5 to 35%.
  3. The illuminating device according to claim 1, wherein the bubble of the diffusion plate becomes larger or smaller in an average size from the light source direction toward the opposite direction.
  4. The lighting apparatus of claim 1, wherein the light source comprises a circuit board disposed behind the diffusion plate and light emitting diodes (LEDs) arranged on the circuit board.
  5. The lighting apparatus according to claim 1, further comprising a support member disposed between the light source and the diffusion plate to prevent the diffusion plate from bending toward the rear light source.
  6. The lighting apparatus according to claim 1, further comprising an auxiliary diffusion resin plate disposed on a front surface of the diffusion plate and made of a white or colored light transmitting resin material.
  7. 7. The lighting apparatus according to claim 6, wherein the auxiliary diffusion resin plate is formed integrally with the diffusion plate.
  8. 7. The lighting apparatus according to claim 6, wherein the auxiliary diffusion resin plate is formed separately from the diffusion plate.
KR1020070017218A 2006-10-30 2007-02-21 Lighting device KR100755010B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR20060105388 2006-10-30
KR1020060105388 2006-10-30

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
EP07833500.7A EP2082390B1 (en) 2006-10-30 2007-10-23 Cover plate for lighting fixture and lighting fixture having the same
CN2007800403142A CN101583987B (en) 2006-10-30 2007-10-23 Cover plate for lighting fixture and lighting fixture having the same
US12/445,098 US8287158B2 (en) 2006-10-30 2007-10-23 Cover plate for lighting fixture and lighting fixture having the same
JP2009534489A JP5081919B2 (en) 2006-10-30 2007-10-23 Cover plate for lighting device
MX2009004663A MX2009004663A (en) 2006-10-30 2007-10-23 Cover plate for lighting fixture and lighting fixture having the same.
PCT/KR2007/005191 WO2008054085A1 (en) 2006-10-30 2007-10-23 Cover plate for lighting fixture and lighting fixture having the same

Publications (1)

Publication Number Publication Date
KR100755010B1 true KR100755010B1 (en) 2007-09-04

Family

ID=38736342

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070017218A KR100755010B1 (en) 2006-10-30 2007-02-21 Lighting device

Country Status (7)

Country Link
US (1) US8287158B2 (en)
EP (1) EP2082390B1 (en)
JP (1) JP5081919B2 (en)
KR (1) KR100755010B1 (en)
CN (1) CN101583987B (en)
MX (1) MX2009004663A (en)
WO (1) WO2008054085A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200447813Y1 (en) * 2009-06-16 2010-02-24 공용호 Air-ball mood surface luminary and air-ball mood surface lamp with air-ball mood surface luminary
KR101864086B1 (en) * 2017-09-27 2018-06-01 이주환 Interior system
KR101890770B1 (en) * 2017-07-21 2018-08-22 주식회사 대한전광 Led media facade
KR102033454B1 (en) * 2018-10-31 2019-10-17 안성섭 Functional signboard

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090231829A1 (en) * 2008-03-17 2009-09-17 Eugene Wang Lightwall instrument
US8556911B2 (en) 2009-01-27 2013-10-15 Vishal M. Mehta Arthroscopic tunnel guide for rotator cuff repair
JP4461198B1 (en) * 2009-04-27 2010-05-12 株式会社東芝 Planar illumination device and liquid crystal display device including the same
KR101840482B1 (en) 2009-12-30 2018-03-20 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Light directing composite film for energy efficient sign
US20130050287A1 (en) * 2010-03-03 2013-02-28 Jeff Baker Display
TWM417573U (en) * 2010-12-30 2011-12-01 Wistron Corp Lighting penetrating device with appearance of bionic texture
KR101771557B1 (en) 2011-01-05 2017-08-25 엘지전자 주식회사 Display Apparatus
JP5827578B2 (en) * 2011-02-14 2015-12-02 株式会社半導体エネルギー研究所 Method for producing optical element
WO2012116129A1 (en) * 2011-02-25 2012-08-30 3M Innovative Properties Company Front-lit reflective display device
KR101240567B1 (en) * 2011-05-19 2013-03-11 (주)다인조형공사 Apparatus for Displaying Image
US20150276166A1 (en) * 2012-10-23 2015-10-01 Koninklijke Philips N.V. Optical cover for a light emitting module
TWI489179B (en) * 2012-12-14 2015-06-21 Wistron Corp Method and equipment for manufacturing light guide plate and light guide plate therewith
CN105074324B (en) * 2013-02-26 2017-07-18 三菱化学株式会社 Thermoplastic resin formed body and its manufacture method, thermoplastic resin light guide, light supply apparatus and liquid crystal display device
CN103257382B (en) * 2013-05-09 2015-08-26 杭州电子科技大学 Based on scattering method and the poriness scattering material of refractive index difference in medium
US20150212988A1 (en) * 2013-06-04 2015-07-30 Panasonic Intellectual Property Corporation Of America Information display method and program
US20150016120A1 (en) * 2013-07-15 2015-01-15 IOVISION Technology Co., Ltd. Structure of Lighting Instrument
KR20150142522A (en) * 2014-06-12 2015-12-22 엘지디스플레이 주식회사 Polarizing plate and method of fabricating the same
KR20160014892A (en) * 2014-07-30 2016-02-12 현대자동차주식회사 Button cover for improving uniformity of lighting
KR101839799B1 (en) 2015-08-12 2018-03-19 (주) 똑똑똑 Advertisement signboard

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040024955A (en) * 2002-09-18 2004-03-24 주식회사 송산 Light diffusing plate
KR20060103297A (en) * 2006-06-01 2006-09-28 권기철 The method of manufacturing and refelection pannel for lcd pannel in monitor assembly

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05477A (en) 1991-06-21 1993-01-08 Nippon Zeon Co Ltd Brightness equalizing sheet and manufacture thereof
JPH08160417A (en) * 1994-12-01 1996-06-21 Sekisui Chem Co Ltd Surface light source device
JPH11273425A (en) * 1998-03-24 1999-10-08 Sumitomo Chem Co Ltd Illumination cover
CN1296250A (en) * 1999-11-10 2001-05-23 贠廷祥 Light guiding sign board filled with diffusion material
JP4371631B2 (en) 2002-05-31 2009-11-25 Nec液晶テクノロジー株式会社 Direct type light emitting device for LCD panel
JP2004079522A (en) * 2002-07-30 2004-03-11 Matsushita Electric Works Ltd Lighting cover and its manufacturing method
US20050052885A1 (en) * 2003-09-04 2005-03-10 Amazing International Enterprise Limited Structure of LED decoration lighting set
JP2005125522A (en) * 2003-10-21 2005-05-19 Oji Paper Co Ltd Porous sheet and its manufacturing method
TWI308977B (en) * 2004-07-07 2009-04-21 Chi Mei Optoelectronics Corp Diffuser plate, manufacturing method of diffuser plate and direct-type back light module
JP4806828B2 (en) * 2004-10-26 2011-11-02 サムスン エレクトロニクス カンパニー リミテッド Light adjusting plate, backlight assembly having the same, and display device
JP4609047B2 (en) * 2004-11-25 2011-01-12 王子製紙株式会社 Light guide and method for manufacturing the same, surface light emitting device, display device, and lighting device
CN2791693Y (en) * 2005-04-29 2006-06-28 群康科技(深圳)有限公司 Light-collecting sheet and backlinght module adopting same
US7431475B2 (en) * 2005-07-22 2008-10-07 Sony Corporation Radiator for light emitting unit, and backlight device
TWM291538U (en) * 2005-12-07 2006-06-01 Eternal Chemical Co Ltd Multi-layer optical film
KR20070078111A (en) * 2006-01-26 2007-07-31 삼성전자주식회사 Polarizer and display apparatus having the same
US20070236939A1 (en) * 2006-03-31 2007-10-11 3M Innovative Properties Company Structured Composite Optical Films
US7690811B2 (en) * 2006-11-17 2010-04-06 General Electric Company System for improved backlight illumination uniformity
CN101191847A (en) * 2006-12-01 2008-06-04 鸿富锦精密工业(深圳)有限公司 Optical plate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040024955A (en) * 2002-09-18 2004-03-24 주식회사 송산 Light diffusing plate
KR20060103297A (en) * 2006-06-01 2006-09-28 권기철 The method of manufacturing and refelection pannel for lcd pannel in monitor assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200447813Y1 (en) * 2009-06-16 2010-02-24 공용호 Air-ball mood surface luminary and air-ball mood surface lamp with air-ball mood surface luminary
KR101890770B1 (en) * 2017-07-21 2018-08-22 주식회사 대한전광 Led media facade
KR101864086B1 (en) * 2017-09-27 2018-06-01 이주환 Interior system
KR102033454B1 (en) * 2018-10-31 2019-10-17 안성섭 Functional signboard

Also Published As

Publication number Publication date
EP2082390A4 (en) 2011-06-08
MX2009004663A (en) 2009-08-12
CN101583987A (en) 2009-11-18
JP5081919B2 (en) 2012-11-28
EP2082390B1 (en) 2014-05-21
JP2010508544A (en) 2010-03-18
US20100031544A1 (en) 2010-02-11
WO2008054085A1 (en) 2008-05-08
EP2082390A1 (en) 2009-07-29
CN101583987B (en) 2011-06-15
US8287158B2 (en) 2012-10-16

Similar Documents

Publication Publication Date Title
US10048424B2 (en) Substrate with indicia configured for optical coupling
US9625641B2 (en) Light guides
TWI453468B (en) Light reflective structure and light panel
JP4479805B2 (en) Lens, light source unit, backlight device, and display device
JP5342016B2 (en) Large area light panel and screen
US8789299B2 (en) Thin internally illuminated sign
CN1904691B (en) Optical unit, a method of manufacturing the same, a backlight assembly having the same and a display device having the same
US5276591A (en) Sign with indirect illumination from light emitting diodes
US7607800B2 (en) Backlight unit and liquid crystal display with the same
TW518769B (en) Lighting element including light emitting diodes, microprism sheet, reflector, and diffusing agent
US8646932B2 (en) Backlight unit and the display device having the same
EP2404201B1 (en) Light guides
TWI321248B (en) Led backlight module
KR100993383B1 (en) Diffuser prism sheet comprising light diffuser in the valley of prism and LCD back light unit thereby
KR100864321B1 (en) Diffuser prism sheet comprising amorphous light diffuser on the valley of prism and lcd back light unit thereby
EP0878720B2 (en) Illuminating device and display using the device
US7559664B1 (en) Low profile backlighting using LEDs
KR100565127B1 (en) Lighted sign housing with diffusive reflective film
TWI440906B (en) Light guide plate and backlight unit including the same
US7542635B2 (en) Dual illumination anisotropic light emitting device
JP4127098B2 (en) Surface light source device
US9086515B2 (en) Direct type backlight and display device
US20180136521A1 (en) Light-emitting device, display apparatus, and lighting apparatus
US20060265919A1 (en) Transparent light-conducting module
US20020159246A1 (en) Illuminated display system

Legal Events

Date Code Title Description
A302 Request for accelerated examination
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
G170 Publication of correction
FPAY Annual fee payment

Payment date: 20120615

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20130828

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20140828

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20150828

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20160825

Year of fee payment: 10

FPAY Annual fee payment

Payment date: 20180123

Year of fee payment: 11

FPAY Annual fee payment

Payment date: 20180828

Year of fee payment: 12

FPAY Annual fee payment

Payment date: 20190828

Year of fee payment: 13